Question

我正在尝试使用ImageView将图片加载到图库中的Picasso。

以下是代码

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(resultCode!= Activity.RESULT_OK) return;

        switch (requestCode) {
            case PICK_GALLERY_IMAGE_REQUEST: {
                Uri imageUri = data.getData();
                Log.d(DEBGUG_TAG,"Image URI: "+imageUri.toString());


                Picasso picasso = Picasso.with(getApplicationContext());
                picasso.setLoggingEnabled(true);
                picasso.load(imageUri).error(R.drawable.c).into(testImgView, new com.squareup.picasso.Callback(){

                    @Override
                    public void onSuccess() {
                        Log.d(DEBGUG_TAG,"Success loading image from uri:PICASSO");
                    }

                    @Override
                    public void onError() {
                        Log.d(DEBGUG_TAG,"Cannot load image");
                    }
                });

问题是从图库中选择图像时会返回文件路径

D/debug: Image URI: file:///storage/emulated/0/DCIM/Camera/IMG_20170126_211524.jpg

这似乎不适用于Picasso作为返回错误并在错误方法中记录D/debug: Cannot load image。

然而，从另一个返回Uri的应用中选择相同的图片，如： D/debug: Image URI: content://com.google.android.apps.photos.contentprovider/-1/1/content%3A%2F%2Fmedia%2Fexternal%2Fimages%2Fmedia%2F90455/ORIGINAL/NONE/1757236944成功。

以任何方式从文件路径加载图片？

Answer 1

不要使用file：//只需使用它就像这个文件：

 Uri targetUri = data.getData();
            if (data.toString().contains("content:")) {
                imagePath = getRealPathFromURI(targetUri);
            } else if (data.toString().contains("file:")) {
                imagePath = targetUri.getPath();
            } else {
                imagePath = null;
            }

 public String getRealPathFromURI(Uri contentUri) {
    Cursor cursor = null;
    try {
        String[] proj = {MediaStore.Images.Media.DATA};
        cursor = getContentResolver().query(contentUri, proj, null, null,
                null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    } finally {
        if (cursor != null) {
            cursor.close();
        }
    }
}

Answer 2

请尝试以下代码：

File imgFile = new  File("/sdcard/Images/test_image.jpg");

if(imgFile.exists()){

    Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());

    ImageView myImage = (ImageView) findViewById(R.id.imageviewTest);

    myImage.setImageBitmap(myBitmap);

}

Answer 3

为本地文件尝试 ImageView 的内置方法 setImageURI

import copy

from colorlog import ColoredFormatter
import scrapy.utils.log

color_formatter = ColoredFormatter(
    (
        '%(log_color)s%(levelname)-5s%(reset)s '
        '%(yellow)s[%(asctime)s]%(reset)s'
        '%(white)s %(name)s %(funcName)s %(bold_purple)s:%(lineno)d%(reset)s '
        '%(log_color)s%(message)s%(reset)s'
    ),
    datefmt='%y-%m-%d %H:%M:%S',
    log_colors={
        'DEBUG': 'blue',
        'INFO': 'bold_cyan',
        'WARNING': 'red',
        'ERROR': 'bg_bold_red',
        'CRITICAL': 'red,bg_white',
    }
)

_get_handler = copy.copy(scrapy.utils.log._get_handler)

def _get_handler_custom(*args, **kwargs):
    handler = _get_handler(*args, **kwargs)
    handler.setFormatter(color_formatter)
    return handler

scrapy.utils.log._get_handler = _get_handler_custom

无法从Picasso中的file：//路径加载图像

3 个答案: